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Question: What is the momentum of radiations of wavelength \(\frac{1}{3}\)nm ? Given : h = 6.625 × 10<sup>–34<...

What is the momentum of radiations of wavelength 13\frac{1}{3}nm ? Given : h = 6.625 × 10–34Js–

A

220 × 10–24 kg ms–1

B

10–24 kg ms–1

C

2 × 10–24 kg ms–1

D

Momentum of photon cannot be defined

Answer

2 × 10–24 kg ms–1

Explanation

Solution

l = hmv\frac{h}{mv}=6.625×10−34mv\frac{6.625 \times 10^{- 34}}{mv}

mv = momentum = 6.625×10−341/3×10−9\frac{6.625 \times 10^{- 34}}{1/3 \times 10^{- 9}}

= 3 × 6.625 × 10–25 kg ms–1

= 2 × 10–24 kg ms–1